7ZX2

Tubulin-Pelophen B complex

Summary for 7ZX2

• Entry DOI: 10.2210/pdb7zx2/pdb
• Descriptor: Tubulin alpha-1B chain, GUANOSINE-5'-DIPHOSPHATE, 2-(N-MORPHOLINO)-ETHANESULFONIC ACID, ... (15 entities in total)
• Functional Keywords: tubulin, pelophen, peloruside, laulimalide, cell cycle/inhibitor, cell cycle-inhibitor complex
• Biological source: Rattus norvegicus (Norway rat); More
• Total number of polymer chains: 6
• Total formula weight: 271078.05

Authors

Estevez-Gallego, J.,Diaz, J.F.,Van der Eycken, J.,Oliva, M.A. (deposition date: 2022-05-20, release date: 2022-11-23, Last modification date: 2024-02-07)

Primary citation

Estevez-Gallego, J.,Alvarez-Bernad, B.,Pera, B.,Wullschleger, C.,Raes, O.,Menche, D.,Martinez, J.C.,Lucena-Agell, D.,Prota, A.E.,Bonato, F.,Bargsten, K.,Cornelus, J.,Gimenez-Abian, J.F.,Northcote, P.,Steinmetz, M.O.,Kamimura, S.,Altmann, K.H.,Paterson, I.,Gago, F.,Van der Eycken, J.,Diaz, J.F.,Oliva, M.A.
Chemical modulation of microtubule structure through the laulimalide/peloruside site.
Structure, 31:88-99.e5, 2023

PubMed Abstract: Taxanes are microtubule-stabilizing agents used in the treatment of many solid tumors, but they often involve side effects affecting the peripheral nervous system. It has been proposed that this could be related to structural modifications on the filament upon drug binding. Alternatively, laulimalide and peloruside bind to a different site also inducing stabilization, but they have not been exploited in clinics. Here, we use a combination of the parental natural compounds and derived analogs to unravel the stabilization mechanism through this site. These drugs settle lateral interactions without engaging the M loop, which is part of the key and lock involved in the inter-protofilament contacts. Importantly, these drugs can modulate the angle between protofilaments, producing microtubules of different diameters. Among the compounds studied, we have found some showing low cytotoxicity and able to induce stabilization without compromising microtubule native structure. This opens the window of new applications for microtubule-stabilizing agents beyond cancer treatment.

PubMed: 36462501
DOI: 10.1016/j.str.2022.11.006

Experimental method

X-RAY DIFFRACTION (2.5 Å)